---
title: delegate
framework: coretelephony
role: symbol
role_heading: Instance Property
path: coretelephony/cttelephonynetworkinfo/delegate
---

# delegate

An object that the system notifies when the data service identifier changes.

## Declaration

```swift
weak var delegate: (any CTTelephonyNetworkInfoDelegate)? { get set }
```

## See Also

### Getting Information About the Cellular Service Provider

- [dataServiceIdentifier](coretelephony/cttelephonynetworkinfo/dataserviceidentifier.md)
- [CTTelephonyNetworkInfoDelegate](coretelephony/cttelephonynetworkinfodelegate.md)
- [serviceCurrentRadioAccessTechnology](coretelephony/cttelephonynetworkinfo/servicecurrentradioaccesstechnology.md)
- [Radio Access Technology Constants](coretelephony/radio-access-technology-constants.md)